Question

A 500kg box falls from a cliff which is 12000m tall. Find the speed,KE, PE, and TE of the box at the height = 1200, 750, and 0.

Answer 1

PE = mgh

Where PE is the potential energy

M is the mass

G is the acceleration to gravity 9.8 m/s2

H is the height

PE = (500 kg) ( 9.8 m/s) ( 1200 m)

PE = 5880000 J

The velocity

V = sqrt(2gy)

V = sqrt(2x9.8x1200)

V = 153.36 m/s

KE

KE = 0.5mv^2

KE = 0.5(500)(153.36^2)

KE = 5880000 J